// EnergyPlus, Copyright (c) 1996-2025, The Board of Trustees of the University of Illinois,
// The Regents of the University of California, through Lawrence Berkeley National Laboratory
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//     software as "EnergyPlus version X" software, where "X" is the version number Licensee
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// POSSIBILITY OF SUCH DAMAGE.

#include <EnergyPlus/Timer.hh>

#include <fmt/format.h>
#ifndef NDEBUG
#    include <stdexcept>
#endif

namespace EnergyPlus {

void Timer::tick()
{
    m_end = TimePointType{};
    m_start = ClockType::now();
}

void Timer::tock()
{
#ifndef NDEBUG
    if (m_start == TimePointType{}) {
        throw std::runtime_error("Timer was not started");
    }
#endif
    m_end = ClockType::now();
    m_duration = m_duration + std::chrono::duration_cast<DurationType>(m_end - m_start);
}

Timer::DurationType Timer::duration() const
{
#ifndef NDEBUG
    if (m_end == TimePointType{}) {
        throw std::runtime_error("Timer was not stopped");
    }
#endif
    return m_duration;
}

std::string Timer::formatAsHourMinSecs() const
{
    // We're working with ms as base.
    // TODO: do we want to report elapsed time of 25 hours as 1 day 1hr 0min 0sec or 25hr 0min 0sec?
    // constexpr auto num_ms_in_day = 1000 * 3600 * 24;
    // if (duration().count() > num_ms_in_day) {
    //     return fmt::format("{:.2%j days %Hhr %Mmin %Ssec}\n", duration());
    // } else {
    //     return fmt::format("{:%Hhr %Mmin %Ssec}\n", duration());
    // }
    auto count = duration().count();
    auto Hours = count / 3600000;
    count -= Hours * 3600000;

    auto Minutes = count / 60000;
    count -= Minutes * 60000;
    double Seconds = count / 1000.0;
    if (Seconds < 0.0) {
        Seconds = 0.0;
    }
    return fmt::format("{:02}hr {:02}min {:5.2F}sec", Hours, Minutes, Seconds);
}

Real64 Timer::elapsedSeconds() const
{
    return duration().count() / 1000.0;
}

} // namespace EnergyPlus
